Magnetisation and Hydrogenation of Mg/Ni Multilayers

S. Pacanowskia, A. Marczyńskaa, H. Dawczak-Dębickia,c, B. Jabłońskia,b, B. Szymańskia and L. Smardza aInstitute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland bFaculty of Technical Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznań, Poland cFaculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

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In this contribution we have studied magnetisation of Mg/Ni multilayers (MLs) to characterise the alloing effect near interfaces. The layered structure was characterised by standard X-ray diffraction. The MLs were deposited by UHV magnetron sputtering onto naturally oxidised Si(100) substrates. Results showed, that due to Mg-Ni alloy formation near interfaces the magnetizations of the MLs were strongly reduced. Effective "dead" Ni layer thickness was estimated as 1.2 nm at room temperature (RT). Furthermore, hydrogen absorption kinetics at a pressure of about 1000 mbar was studied at RT in Pd covered Mg/Ni MLs using four-point resistivity measurements. Results showed that the fastest initial rise in resistance in the first 9 s was observed for dNi=3.5 nm.

DOI: 10.12693/APhysPolA.133.617 PACS numbers: 75.70.Cn, 61.10.Nz